, with a very mild winter (but with the possibility of short cold spells) and a very hot, muggy summer.
, near the Mexican border, and 35 km (20 mi) away from the coast. Across the Rio Grande River lies the Mexican city of Matamoros.
We are on the 25th parallel, not far from the Tropic, and indeed the hot season is very long.
of the coldest month (January) is of 17.2 °C (63 °F), that of the warmest month (August) is of 30.6 °C (87 °F).
, from December to February, is mild.
The sun shines quite often, although there are periods characterized by clouds, rain and wind.
There may be hot periods even in the middle of winter, with highs around 30 °C (86 °F) and more.
, with highs below 10 °C (50 °F). Very rarely, as happened on Christmas 2004, in December 2017 and in February 2021, it can even
. In recent decades, the record is -9 °C (16 °F), recorded in December 1989.
, from June to September, is very hot and sunny, with some thunderstorms. There combination of humidity and temperature makes the heat sweltering.
There can be long, very hot periods even in May and October, and sometimes in late April, while for short periods, the temperature can reach about 40 °C (104 °F) from March to September. The record is 41 °C (106 °F), recorded even at the end of March 1984, as well as at the beginning of September 2000.
From June to November (but with a higher probability from August to October), there is the risk of
. The city was hit hard by Hurricane Dolly in late July 2008.
temperature ranges between 20 °C (68 °F) and 29 °C (84 °F). From January to March, the sea is very cool, while it becomes pleasantly warm for swimming from June to October.
The best time to visit Brownsville is from November to March. Winter, from December to February, is generally a mild season, although it can sometimes get cold (especially in December and January). You can therefore choose the months of March and November.
. Here are the average temperatures.
January, the coldest month of the year, is generally a very mild month. The average temperature is of
17.2 °C, with a minimum of
11.7 °C and a maximum of
22.6 °C.

On the coldest nights of the month, the temperature usually drops to around
2.5 °C. However, it dropped to
-2 °C in January 2010.

On the warmest days of the month, the temperature usually reaches around
29 °C. However, it reached
35 °C in January 2017.

Precipitation amounts to
25 mm, distributed over 7 days.
The day lasts on average 10 hours and 40 minutes.

There are on average 4 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
16 kph.

The average sea temperature is of
20.6 °C. Therefore, the sea is cool for swimming.
February is generally a warm month. The average temperature is of
19.2 °C, with a minimum of
13.8 °C and a maximum of
24.6 °C.

On the coldest nights of the month, the temperature usually drops to around
4.5 °C. However, it dropped to
-2.2 °C in February 2011.

On the warmest days of the month, the temperature usually reaches around
30.5 °C. However, it reached
33.9 °C in February 1996.

Precipitation amounts to
25 mm, distributed over 6 days.
The day lasts on average 11 hours and 20 minutes.

There are on average 5.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
17.8 kph.

The average sea temperature is of
19.8 °C. Therefore, the sea is very cool for swimming.
March is generally a warm month. The average temperature is of
21.8 °C, with a minimum of
16.7 °C and a maximum of
27 °C.

On the coldest nights of the month, the temperature usually drops to around
6.5 °C. However, it dropped to
2.2 °C in March 2007.

On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
38.3 °C in March 2009.

Precipitation amounts to
35 mm, distributed over 4 days.
The day lasts on average 12 hours and 0 minutes.

There are on average 6.5 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
18.9 kph.

The average sea temperature is of
20.2 °C. Therefore, the sea is very cool for swimming.
April is generally a warm to hot, muggy month. The average temperature is of
24.8 °C, with a minimum of
19.8 °C and a maximum of
29.8 °C.

On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
3.9 °C in April 2007.

On the warmest days of the month, the temperature usually reaches around
34.5 °C. However, it reached
40 °C in April 2017.

Precipitation amounts to
35 mm, distributed over 4 days.
The day lasts on average 12 hours and 50 minutes.

There are on average 8 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
19.8 kph.

The average sea temperature is of
22.2 °C. Therefore, the sea is cool for swimming.
May is generally a very hot, muggy month. The average temperature is of
27.8 °C, with a minimum of
23.2 °C and a maximum of
32.4 °C.

On the coldest nights of the month, the temperature usually drops to around
15.5 °C. However, it dropped to
8.9 °C in May 1996.

On the warmest days of the month, the temperature usually reaches around
35 °C. However, it reached
38.3 °C in May 1995.

Precipitation amounts to
55 mm, distributed over 5 days.
The day lasts on average 13 hours and 25 minutes.

There are on average 8.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
19.5 kph.

The average sea temperature is of
25.2 °C. Therefore, the sea is warm enough for swimming.
June is generally a very hot, muggy month. The average temperature is of
29.8 °C, with a minimum of
25.1 °C and a maximum of
34.4 °C.

On the coldest nights of the month, the temperature usually drops to around
21.5 °C. However, it dropped to
18 °C in June 1997.

On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
40 °C in June 2019.

Precipitation amounts to
75 mm, distributed over 6 days.
The day lasts on average 13 hours and 40 minutes. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.

There are on average 10 hours of sunshine per day. So, the sun shines 75% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
17.6 kph.

The average sea temperature is of
27.8 °C. Therefore, the sea is pleasantly warm and allows long swims.
July is generally a very hot, muggy month. The average temperature is of
30.2 °C, with a minimum of
25.4 °C and a maximum of
35 °C.

On the coldest nights of the month, the temperature usually drops to around
22.5 °C. However, it dropped to
21.7 °C in July 2001.

On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
40 °C in July 2003.

Precipitation amounts to
50 mm, distributed over 5 days.
The day lasts on average 13 hours and 35 minutes.

There are on average 11 hours of sunshine per day. So, the sun shines 79% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
17.7 kph.

The average sea temperature is of
28.4 °C. Therefore, the sea is pleasantly warm and allows long swims.
August, the hottest month of the year, is generally a very hot, muggy month. The average temperature is of
30.6 °C, with a minimum of
25.4 °C and a maximum of
35.7 °C.

On the coldest nights of the month, the temperature usually drops to around
22.5 °C. However, it dropped to
20 °C in August 2015.

On the warmest days of the month, the temperature usually reaches around
37.5 °C. However, it reached
40.6 °C in August 2012.

Precipitation amounts to
55 mm, distributed over 7 days.
The day lasts on average 13 hours and 0 minutes.

There are on average 10 hours of sunshine per day. So, the sun shines 76% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
15 kph.

The average sea temperature is of
28.8 °C. Therefore, the sea is pleasantly warm and allows long swims.
September is generally a very hot, muggy month. The average temperature is of
28.6 °C, with a minimum of
23.7 °C and a maximum of
33.4 °C.

On the coldest nights of the month, the temperature usually drops to around
18 °C. However, it dropped to
12.8 °C in September 1995.

On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
41 °C in September 2000.

Precipitation amounts to
145 mm, distributed over 10 days.
The day lasts on average 12 hours and 20 minutes.

There are on average 8.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
12.2 kph.

The average sea temperature is of
28.8 °C. Therefore, the sea is pleasantly warm and allows long swims.
October is generally a warm to hot, muggy month. The average temperature is of
25.5 °C, with a minimum of
20.3 °C and a maximum of
30.7 °C.

On the coldest nights of the month, the temperature usually drops to around
11 °C. However, it dropped to
1.7 °C in October 1993.

On the warmest days of the month, the temperature usually reaches around
34 °C. However, it reached
38.9 °C in October 2013.

Precipitation amounts to
95 mm, distributed over 8 days.
The day lasts on average 11 hours and 30 minutes.

There are on average 7.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
13.6 kph.

The average sea temperature is of
27.1 °C. Therefore, the sea is pleasantly warm and allows long swims.
November is generally a warm month. The average temperature is of
21.4 °C, with a minimum of
16 °C and a maximum of
26.8 °C.

On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
-0.6 °C in November 1993.

On the warmest days of the month, the temperature usually reaches around
31.5 °C. However, it reached
33.3 °C in November 1992.

Precipitation amounts to
45 mm, distributed over 6 days.
The day lasts on average 10 hours and 55 minutes.

There are on average 5.5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
14.6 kph.

The average sea temperature is of
24.4 °C. Therefore, the sea is warm enough for swimming.
December is generally a very mild month. The average temperature is of
18 °C, with a minimum of
12.6 °C and a maximum of
23.4 °C.

On the coldest nights of the month, the temperature usually drops to around
2.5 °C. However, it dropped to
-2.2 °C in December 2004.

On the warmest days of the month, the temperature usually reaches around
29.5 °C. However, it reached
32.8 °C in December 2015.

Precipitation amounts to
30 mm, distributed over 7 days.
The day lasts on average 10 hours and 30 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.

There are on average 4 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
15.3 kph.

The average sea temperature is of
22.1 °C. Therefore, the sea is cool for swimming.